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निम्नलिखित में से कौन-सा एक ‘‘रचनावादी’’ कक्षा में गणितीय गतिविधि को निरूपित नहीं करता है ?

A student reaches school on his bicycle in 3/2 hours at a speed of 8 km/h. On the return journey he rests for half an hour and takes a route which is 1 km shorter. What should be the percentage increase in the speed of the bicycle so that he reaches home in the same time?

उस घन का आयतन ज्ञात कीजिए, जिसकी भुजा 8 cm है।

A sum of money invested at 10% compound interest per annum amounts to रु 10,164 in 2 years interest compounded annually, what was the sum invested ?

What is the range (in μ m) of core diameter of a multimode step index fiber? एक मल्टीमोड स्टेप इंडेक्स फाइबर के कोर के व्यास की सीमा (माइक्रो मीटर में) क्या है?

How many States of India have common border with Pakistan and Bangladesh? भारत के कितने राज्यों की सामान्य सीमा (कॉमन बॉर्डर) पाकिस्तान एवं बांग्लादेश के साथ है?

The ability of a material to perform its intended function throughout its designed life without undergoing considerable deterioration is termed as

ऐम्पियर सेकण्ड किसकी इकाई है?

Q: The average marks obtained in a test of 18 boys in a class is 16, while the average of the total 30 students in the class is 18.1. What is the average of marks obtained by the girls?

A. 21.25

B. 20.5

C. 20.75

D. 21

Correct Answer: Option A -

Explanations:

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